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4684244 |
Method of scanning optical density patterns
A method of optically scanning a plurality of optical density patterns, such as blood samples or the like is provided wherein the samples are arranged in rows and each include a plurality of...
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4684252 |
Automated analyzing apparatus
An automated analyzing apparatus with a photometer including an entrance slit permitting passing therethrough of the entirety or a portion of a convergent light beam transmitted successively...
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4683579 |
Method and apparatus for measuring blood constituent counts
Blood constituents such as red cells, white cells, and platelets are centrifuged into layers in a capillary tube and the true extent of one or more of the layers is measured photometrically. Each...
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4682887 |
Optical assay for stored human platelets
The viability of a pack of stored blood platelets is monitored by gripping the pack between two plates (6) and (7) which are closed to pinch together the walls of the bag (10) along an L-shaped...
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4672038 |
Optical readout for blood sample analysis
Apparatus and method for detecting the presence of a substance in a biological material carried in a cartridge. Suitable substances are applied to such material, and adhere thereto if the substance...
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4667830 |
Method and means for sorting individual particles into containers for culturing, cloning, analysis, or the like
Method and apparatus for sorting individual particles into containers, such as the wells of a microculture tray, are disclosed. The particles may comprise, for example, individual biological cells...
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4667335 |
Method of determining the diagnostic significance of the content of a volume of biological sample containing particles
The present invention relates to a method for examining the content of a volume of biological sample containing particles to determine the diagnostic significance of that volume of biological...
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4665553 |
Methods and apparatus for analysis of particles and cells
Samples are prepared and applied to a cuvette, and the cuvette is translated in a given direction. Laser light is coupled to the sample through a Bragg cell, which causes the beam to scan the...
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4663127 |
Gas flow cartridge having resilient flexible membrane with slit separating reaction and reagent chambers
A gas flow cartridge in which to conduct analytical coagulation tests on a sample of fluid such as blood includes a tube-like member and a resilient flexible membrane having a slit formed...
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4662742 |
Scatter/fluorescene beam splitter in a flow cytometry apparatus
A flow cytometry apparatus for determining one or more characteristics of particles or the like flowing in a liquid stream includes a nozzle for generating a liquid flow stream for moving particles...
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4660971 |
Optical features of flow cytometry apparatus
A flow cytometry apparatus includes a transparent liquid flow chamber and a nozzle for providing a stream of particles, to be analyzed, through the flow chamber. A light source is provided along...
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4659550 |
Method and apparatus for measuring blood coagulation time
Method for measuring the coagulation time of a blood sample in which a sample-reagent mixture is formed by introducing the sample and at least one reagent into a cuvette. To reduce the operating...
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4658244 |
Air-in-line detector
A detector for automatically determining the presence of air in a fluid line comprises a plurality of ON-OFF optical sensors selectively disposed in series along the axis of a portion of an I.V....
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4653907 |
Blood culture bottle examining instrument
An instrument for making a visual examination of a blood culture bottle for the presence of microorganisms, the instrument having an elongated base on which is mounted a platform defining a seat...
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4641658 |
Cardiac flow monitor
Previously undesired artifacts in a color signal used in fiberoptic cardiac catheters to measure blood oxygenation levels are used to produce indications of blood flow and true pulse. For this...
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4627014 |
Method and apparatus for determination of an analyte and method of calibrating such apparatus
A method and apparatus are described for the determination of an analyte in an aqueous liquid while eliminating the biasing effect of unknown interferents which are preformed or formed in situ...
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4622298 |
Detection and quantitation of microorganisms, leukocytes and squamous epithelial cells in urine
A method for the assessment of bacteriuria and pyuria includes the simultaneous detection and quantitation of microorganisms, leukocytes and squamous epithelial cells in a urine specimen. The three...
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4609286 |
Dispersion prism for separation of wavelengths of spectrally rich light in a flow cytometry apparatus
A flow cytometry apparatus for determining one or more characteristics of particles or the like flowing in a liquid stream includes a nozzle for generating a liquid flow stream for moving particles...
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4606631 |
Particle counter
A first syringe pump feeds a sample solution such as, for example, a diluted blood into an inner tube of a flow cell, and a second syringe pump feeds a sheath solution such as, for example, a...
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4600302 |
Flow cytometry apparatus with uniform incoherent light excitation
A flow cytometry apparatus for determining one or more characteristics of particles or the like flowing in a liquid stream includes a nozzle for generating a liquid flow stream for moving particles...
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4599307 |
Method for elimination of selected cell populations in analytic cytology
A method for identifying subpopulations of cells of interest without interference from other cells. In the method, a sample of at least three (3) types of cells, including a first and second type...
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4599219 |
Coagulation detection by plunger sensing technique
Coagulation is detected in a fluid sample contained in either a gas flow cartridge or a plunger sensor cartridge, either one of which may be inserted in an actuator mechanism which has the...
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4597392 |
Arrangement for measuring diffusing particles
An arrangement for measuring diffusing particles has at least one monochromatic radiation source and a light measuring device, as well as at least one material limited particle-permeable indicator...
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4596464 |
Screening method for red cell abnormality
Red cell samples are passed through a zone of focused illumination, and a scatter vs. time pulse is obtained for each. Each pulse is analyzed for pulse width, pulse area, and pulse shape. These...
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4596035 |
Methods for enumerating 3-part white cell differential clusters
Methods useful for differentiating and enumerating subpopulations of particles in a sample and more particularly relates to the enumeration of leukocyte subclasses. Enumeration is accomplished by...
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4586190 |
Blood cell discriminator and counter utilizing transmitted and scattered light
A blood counter comprising a sheathed flow cell; a light source including what has the wavelengths causing absorption of light by hemoglobin in the blood; means for receiving transmitted light;...
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4581334 |
Simultaneous detection of leukocyte phagocytic and killing ability
Methods for the determination of phagocytic and killing ability of selected leukocyte subclasses based upon the use of three part differentials obtained by light scatter characteristics and gated...
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4580895 |
Sample-scanning photometer
An apparatus and method for reading agglutination tests and other procedures by scanning the contents of a microtest well or other sample-holding vessel to determine a certain charactersitic of the...
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4577964 |
Apparatus and method for detecting platelets in whole blood
A diluted whole blood sample is hydrodynamically focused to a given point. A light beam is transversely focused on the same point and the principles of dark field microscopy are utilized, detecting...
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4576477 |
Method and apparatus for measuring density profiles in microscopic tube flow
Particle distribution in a fluid flowing through a microscopic tube is achieved by flowing the fluid vertically-downward through a transparent capillary tube and passing light through the flowing...
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4575492 |
Process and device for the detection and quantification of agglutinates
The present invention relates to a process and device for the detection and quantification of agglutinates, in recipients of which at least the bottom are transparent. According to the invention,...
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4575240 |
Visible sample chamber for fluid analysis
Disclosed is a sample chamber which is particularly adapted to the spectrophotometric analysis of blood samples. The instrument of which the sample chamber is a part includes means for directing a...
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4575490 |
One step method for sphering and fixing whole blood erythrocytes
A rapid one step, one reagent method is disclosed for the isovolumetric sphering and fixing of whole blood erythrocytes.
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4573796 |
Apparatus for eliminating background interference in fluorescence measurements
The disclosure is directed to an apparatus for eliminating background interference during fluorescence measurements in a multiple laser flow cytometer. A biological particle stained with...
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4573195 |
System for the automatic observation and quantification of phenomena capable of being detected by fluorescence
A system for the automatic observation and quantification of phenomena capable of being detected by fluorescence and appearing in a localized zone (8), the system comprising a source of radiation...
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4569589 |
Lung water computer system
A lung water computer system utilizing a single optical detection path. A single beam of visible (VIS) and infra-red (IR) radiation is chopped and filtered in at least two bandwidths centered on...
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4547075 |
Device for the detection and calculation of particles present in a moving suspension for hematological analyses and the like
A blade or thin beam of concentrated coherent light is formed in order to detect and calculate the number of particles present in a moving suspension that flows through a suspension conduit...
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4545677 |
Prismatic beam expander for light beam shaping in a flow cytometry apparatus
A flow cytometry apparatus for determining characteristics of cells or the like flowing in a liquid stream includes a nozzle for generating a liquid flow path for moving cells therethrough...
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4538733 |
Particle sorter with neutralized collection wells and method of using same
An apparatus for sorting particles comprises a nozzle or the like for forming discrete droplets of particles from a flowing liquid stream containing those particles. A detector is provided for...
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4533519 |
Gas flow coagulation test cartridge having movable member establishing communication between reagent and reaction chambers
A gas flow cartridge in which to conduct a coagulation-related test uses an elongated pin member movably positioned within a communication opening which separates a reagent chamber from a reaction...
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4522494 |
Non-invasive optical assessment of platelet viability
A system for assessing platelet viability in a transparent flexible bag. The apparatus employed consists of a support for clampingly receiving the bag and defining an optically exposed constricted...
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4522493 |
Partial injection apparatus
A partial injection apparatus is adapted to partially inject a required amount of a sample and to control an amount of a diluent to be added therein by partially injecting while detecting...
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4515274 |
Particle analyzing and sorting apparatus
Disclosed is a flow-through, particle analyzer and sorter apparatus for simultaneous optical and electrical impedance measurements on a stream of particles, comprising a flow cell having a pair of...
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4513438 |
Automated microscopy system and method for locating and re-locating objects in an image
A microscopy system for automatically locating and re-locating objects-of-interest in an image which has one or more objects against a background. Each of the objects-of-interest is characterized...
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4509522 |
Infrared optical measurement of blood gas concentrations and fiber optic catheter
A simple compact optical device and method for quickly measuring the concentration of CO and CO 2 , bound to hemoglobin or dissolved in a person's blood using optical techniques which do not...
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4510438 |
Coincidence correction in particle analysis system
Flat beam optical sensing performed transverse of a flow aperture, of the particles passing through the aperture, directly indicates the presence of individual particles in the aperture. The...
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4501491 |
Device for optical indication of the phenomena of coagulation of blood, concentration and aggregation of blood platelets, or the like
Indicator device to study the phenomena of blood coagulation, concentration and aggregation of blood platelets and the like including support means (14) bearing test tubes (13) equipped in a...
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4492462 |
Photometric method for determining courses of reactions
The invention provides a photometric method of determining courses of reaction in a specimen, in which method the intensities of the transmitted light and of the stray light are measured, wherein...
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4492752 |
Method for discriminating between unstained and absorbing dye stained cells
Method for discriminating unstained cells from stained cells in a heterogeneous population. Specified cell types are stained with an absorbing stain and all cells are passed through the class of...
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4477192 |
Magnetic stirring apparatus and method
The contents of a container are stirred by continuously and successively subjecting a magnetic stirring element provided in the container to a plurality of moving magnetic fields.
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